#Learning Italian

So I asked my Italian teacher today why I get strange looks whenever I say “no sachetto”, when a checker offers me a bag. After all, this is what my Italian phrase book says is the word for shopping bag. I got the weird look again from her and we clarified the phrase. First of all a bag in a grocery store is a “borsa”. Second, I’m pronouncing it wrong so it sounds like “saghetto” instead of “saketto”. So why the odd looks over the mis-pronunciation? Saghetto has two meanings. The first one is a type of small saw or file. And the other meaning is sexual.
So yeah, I’ve been mumbling crude phrases at the check-out lady/man for the past six weeks.